ET PHISHING Base64 HTTP URL Refresh - Common Phish Landing Obfuscation 2016-01-01

Query · suricata

flow:to_client,established;
file_data;
content:"<meta http-equiv="; nocase;
content:"refresh"; distance:1; nocase;
content:"data|3a|text/html|3b|base64,"; distance:0; fast_pattern; nocase;
pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})\x22|\x27/Rsi";
content:!"cGFnZV9ub3RfZm91bmQuaHRtb";
Raw source ET PHISHING Base64 HTTP URL Refresh - Common Phish Landing Obfuscation 2016-01-01 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET PHISHING Base64 HTTP URL Refresh - Common Phish Landing Obfuscation 2016-01-01";
    flow:to_client,established;
    file_data;
    content:"<meta http-equiv="; nocase;
    content:"refresh"; distance:1; nocase;
    content:"data|3a|text/html|3b|base64,"; distance:0; fast_pattern; nocase;
    pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})\x22|\x27/Rsi";
    content:!"cGFnZV9ub3RfZm91bmQuaHRtb";
    classtype:social-engineering;
    sid:2031695; rev:3;
    metadata:created_at 2016_01_01, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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